Machine for bending metal



Patented 2?, 1923,

WELAIELLE VOL'LJJIEB, OF BBOOKLYN, NEW YORK.

Application le. July G.,

To NZZ whom i may concern Be it known that l, llTrLi-innil ilonmrnn, a citizen of the United es, and a resident o'f the borough oilroolrlyn. in the city ot' New York, county ot' Kings, and State of vNew York, have invented certain new and useful improve-ments in h/iachines Yfor Bending` Metal, oi which theiollowing is a description.

The present invention relates to improvements in machines for bending metal, and more especially angle iron, and constitutes an improvement upon the machine disclosed in my S. Patent No. 1,080,309, dated December 2, 1913.

An object or the invention is to provide a. hammer mechanism, adapted to cooperate with the bending mechanism, and which is so designed as to produce a positive application ot the hammer blow to the metal, and particularly a blow in the direct line of force of the hammer during its movement.

I `further propose to provide improved means for regulating the hammer as the metal is bent, to the end that the machine will be operated with facility.

lt is a further object to provide improved actuating vmeans for the hannnc-r., and which, as will more fully hereinafter appear, will be shock absorbent, and will eliminate to a very great eXtent, rack and tear upon the machine.

With these and other objects in view, an embodiment of my invention is shown in the accompanying drawings, and this embodiment will be hereinafter more fully described with reference thereto, and the invention will be fully pointed out in. the claims.

1n the accompanying drawings:

Figure 1 is a front elevation of parts of the machine constituting my improvements.

Figure 2 is a plan view thereof, partly in section along the line 2-2 of Figure 1, and

showing parts of the bed plate and the metal bending mechanism.

ligure 3 is an end view of the hammeractuatitng mechanism.

Figure l is a sectional view taken along the line lj-l of Figure 1, and

Figure 5 is a horizontal sectional View taken on the line 5-5 of Figure 1.

Similar reference characters indicate corresponding parts throughout the several iigures of the drawings.

Referring to the drawings, the metal bendlege.

sei-iai no. 394,025.

plate bending arm 11, pivoted thereon, and adapted to be oscillated about itspivot by means of a. circumferential rack 12 ening machine .,omprises generally a bed 10, a metal gaged by a worm 13, aclamp 1li adapted to clamp the metal strip against the support 15, and a vertical reciprocatitng hammer 16, adapted to be operatedby the oscillation ot' the lever arm 17. ln operation the bending arm 11 is gradually moved about its pivot, thereby bending the metal strip about the clamp 141-, and at the same time the hammer falls in quick succession upon the upper side ofthe metal, thereby maintaining the cross sectional transverse dimension oijf the metal at the bend, and keeping the horizontal ange of the meta-l in the case oi' the bending oi: angle iron, from buckling up or down at the point oi bending.

According to my improvements a han'nner supporting head 1S is mounted upon the upper end ot a supporting standard 19, said head being provided with a cylindrical portion 20. having a cylindrical bore extending vertically therethrough, and within the bore there is rotatably mounted a cylindrical head 21 provided at its upper end with a 'flange 22, connected by vertically disposed tie rods 23 to a flange 24E of a cylindrical portion 25 extending upwardly into the portion 20, and engaging the under side of the head portion 21; so that the members 21 and 25 are adapted to be rotated together within the portion 20. For this purpose a lever or handle 26 is provided upon the flange 24. A vertically disposed cylindrical passage 27 is provided through the members 21 and 25, and is positioned eccentrically with its periphery passing through the axis of rotation ot the members 21 and 25, a vertically disposed reciprocating shaft 28 being provided in said passage 27, the said shaft being keyed, as at 29, to prevent its relative turning` movement within the passage. To the lower en d of the shaft 28 there is connected the hammer 16. rlhe head 30 of the hammer has two vertical faces at right angles to each other, the apex 'Formed by the intersection of these faces being aligned with the vertical axis ot rotation of the members 21 and 25, so that as the said members are rotated within the portion 20 ci the head, the head of the hammer willswing about said apex as a center, while at the same time the weight ot the hammer is directly'beneath the shaft 28,

so that as the hammer raised, and drops,

as will hereinafter more fully appear, the

b low upon the metal is positive, and in the direct line of forcev created by the shaft 28.

.ln spaced relation above the hammer 10 there is provided upon the shaft 28 a collar be notedlcorresponds in its relation to the shaft, to the relation between the shaft and the members and The lever 17 is pivotally mounted at 35 at the upper endv of a supporting standard. 36, and at its forked portion there is provideda U-shaped bracev 38 connected thereto by bolts 39 and 4:0, the intermediate portion of the brace being cir-v cumferential oi" the enlargement v32 of the shaft 28, and provided with spaced forwardly projecting ears l1 and 42, between which is pivotally connected one ear ot a link 413, connected at its other end to ears del provided upon the collar 31, said collar being also connected at its sides by links l5 and 416 to the sides ot the 'forked end ot' the lever;

The lever 17 is provided with braces /18 Aand L19 extending longitudinally along the opposite sides thereof, andthe short arm ot' said lever is pivotally connected to a link bar 51 by means oit a bolt 50 extending 'through the lever and the ends of the braces a8 `and lThe lower `end of the link 51 is provided with a longitudinal slot 52, in which' a bolt 53 is slidably engaged. rlhis bolt connects the rods 136 and 137 to each other at one of their ends, said rods being slidably engaged in the guides 55 `on the standard 36. The other ends of the rods are connected by a head block 138.

A bracket member 140 is fixed 'at its ends to the'standard 36, and an adjusting screw 139 is .rotatably mounted. in this bracket. This screw has threaded. engagement in the head block 138, and has a bearing,` at one ol its ends in the standard 3,6. `Upon the other end of said screw a suitable hand wheel 141 yis fixed. It will be readily seen that by turning the screw 139, the link 51 may be an- 'gularly adjusted with respect' to the lever 17. This particular adjusting means for the link 51 is disclosed in my prior Patent No. 1,800,309, hereinbetore referred to. A lip at the lower end of the link 51 projects in thepath of a trip wheel 58, rotatably mounted in a bearing 59, adapted to be turned.

lfrom any suitable source, the trip wheel in the present embodimentbeing illustrated as having three trip lingers equally spaced, adapted as the wheel is rotated, to engage the lip, forcing` the link 51` downwardly7 thereby raising the hammer 60, and, as the finger passes from engagement with the lip.,

releasing the link and permitting the hammer to tall.

Above the lip 57 there is provided a plate 50, pivoted at the sides of the linkl, as at 61, and connected at its ends by tie rods 62 and 63, toa cross bar Gel, to which is conneet-ed one end or' a helical spring` 65, the other end of said spring being connected to a bracket 5G, mounted upon the link 51, said spring exerting an upward torce upon the plate 60. A pair of depending guide rods 67 and G8 are provided at the under side ci? the plate 00, and extend through openings 69 and 70r in the lip 5r, nuts 71 and 72 being respectively provided upon the ends of the rods 57 and 68 to limit the upward move ment oit the plate'50 away from the lip.` i I facing 73, of leather or other suitable mateiial, is provided upon the upper side oit the lip 57 in spaced relationr to the inner side oit the 4plate 60. rlhis construction provides a yieldable Contact ofthe fingers 58 of the trip wheel with the end or" the link 51, which will absorb shock, and, as above pointed out, will relieve, to a great extent, rack and ytear upon the machine.

lt will be noted. that the several. parts 'of this construction are entirely adjustable.` ln order to vary the throw oit thev hammer, and also the frequency oit the blows, the link 51 may be adjusted inwardlyv or outwardly about the pivot 50 by turning the screw 511, it being` seen that when moved. outwardly there is contact with the fingers 58 for a longer period than when the link is moved inwardly. and` consequently the link will be moved lfurther downwardly, and the throw o the hammer will be 'proportionately increased. i

fit the upper end ot' the shaft 28 there is provided a hook 74C connected byv the spring 75 to the upper end of the member 21, this spring being adapted to increase the force ot the hammer, the saine being tensioned as rthe hammer is lifted, and contracted asthe hammer is dropped. At the under sident the member 25 there is secured a coil spring 76 against which the enlargement 32 moves as the hammer raised., and prevents ]ar ring upon the under side oit said member 25, and also reacts when expanded to increase the force of thedownward dropping move- K ment of the hammer.

With my present improvements a machine is provided in which the blowof the hammer i/lanoaf/ I claim:

l, In a. metal bending,` machine, a hammer mechanism consisting of a vertically reciprocating shaitt, a hammer supported upon the lower end of said shaft, a rotatable bearing' for said shaft support for said bearing, said bearing being` provided W'th an eccentrically positioned, vertically disposed passage, through which said shaft is adapted to reciprocate, means for reciprocating said shaft, and means tor turning` said bearing, whereby said hammer is turned about the axis of rotation of said hearing.

2. ln a metal bending; machine, a hammer mechanism consist-ing oit a vertically reciproeating` shaft, a hammer supported upon 'the lower end oit said shaft, a rotatable bearing for said shaft, a support for said bearing, said bearing being),` provided with an eccentrically positioned, vertically disposed passage through which said shattis adapt-ed to reciprocate, the periphery oi: said passage passing through the axis of rotation ot said bearing thereon.

ln a metal bending,y machine, a hammer mechanism consisting;` ot a vertically reciprocating shaft, a hammer supported upon the lower end of said sha-itt, a rotatable bearing,- for said sha-tt, a support or said bearing, said bearing' being` provided with an eccentrically positioned, verticallj,7 disposed passage through which said shaft is adapted to reciprocate, the periphery ol' said passage passing` through the axis of rotation of said bearing` thereon, and a head on said hammer having vertically disposed Yliaces at right angles to each other, and intersecting` in line with the axis of rotation of said bearing,

Said head being;` directly beneath said reciprocating shaft.

4. ln a metal bending` machine, a vibrating hammer, a lever connected thereto, a linlr also connected to said lever, intermittent means for moving said link and lever, and means for adjusting' said linl: toward and :trom said intermittent means.

A metal bending` machine consisting of a vertically reciprocating hammer, a tripping lever ot the iirst-class, support for the itulcrum ot said tripping lever, means connect-ing one end ot said lever to said vertical reciprocatingl member, a depending link at the other end oit said lever pivotally connected thereto, a lip on said lever, cushioning means carried by said lip, and a trip Wheel adapted to intermittentljv engage said lip to lift and release said lever, Wherehy said hammer is raised and dropped.

6. A metal bending machine consisting ot a vertically reciprocating` hammer, a tripping lever ot the first-class, a support for the fulcrum of said tripping` lever, means connecting one end of said lever to said vertical reciprocating member, a depending' link at the other end of said lever pivotally connected thereto, a lip on said lever, cushioning means carried by said lip, a trip Wheel adapted to intermittently engage said lip to litt and release said lever, whereby said hammer is raised and dropped, and means for adjusting said link to regulate the period of engagement of said trip Wheel With said lever.

In testimony that l claim the foregoing' as my invention l have signed my name. V

ILLAM VOLLMEB. 

